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Ch16A - Lauren Taranow lmt827 Problems and Questions for...

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Lauren Taranow lmt827 Problems and Questions for Chapter 16A Material From Brooker, pages 452 and 453 (3rd edition, pages 451 and 452) C2. A gene mutation changes an AT base pair to a GC pair. This causes a gene to encode a truncated protein that is nonfunctional. An organism that carries this mutation cannot survive at high temperatures. Make a list of all the genetic terms that could be used to describe this type of mutation. Point mutation, substitution, transition, nonsense mutation. C6. The lactose permease is encoded by the lacY gene of the lac operon. Let’s assume a mutation occurred at codon 64 that changed the normal glycine codon into a valine codon. The mutant lactose permease is unable to function. However, a second mutation, which changes codon 50 from an alanine codon to a threonine codon, is able to restore function. Are the following terms appropriate or inappropriate to describe this second mutation? A. Reversion: Appropriate when describing phenotype, because non function was restored C.
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